All have sinned against God (Rom 3:23). God is Holy and perfect and therefore must punish sin perfectly. The consequences of sinning against an eternal God are eternal. The wages of sin are death (Romans 6:23). But Christ came to earth and lived a perfect sinless life on our behalf, and bore the eternal punishment of sin for all who are His on the cross of Calvary. For those who confess their sin to God and trust in Christ alone for their salvation will receive the gift of eternal life.
Check out this video: https://www.youtube.com/watch?v=uZdv-TtiMkg